Adjustable hinge for foundry flasks



Jan. 22, 1929. C. L. GOHMANN ADJUSTABLE HINGE FOR FOUNDRY FLASKS FiledDec. 21. 1927 'F16'. 1.

CA arles Lehmann l Y ATToREi/.'

m. N a m 1 N 9 6 dm 3 4 4 m l A E n G H C c D M M m 6 2 l L G 1- .1 la@,Q F u f kr Patented Jan. 22, 1929.

tiri" ar n insane l CHARLES L. GOHMNN, OF NEVI ALBANY, NDANA, ASEGNOR TOGUMMI-@JN BIRS. g ANDKAHLER COMPANY, UF NEVI ALBANY, INDANA, ifiGURPRATION 01 IN- DANA.

ADJUSTABLE HINGE FOR FOUNDRY FLASKS.

Application filed December 21, 1927. Serial No, 241.600.

lli/ly invention relates to adjustable hinges and more specifically tohinges for laslrs commonly used in foundry practice.

The objects of my invention are to provide an adjustable hinge forfoundry flasks and the like which is simple, elficient, durable,inexpensive to manufacture and readily adapted to conveniently assembleor disassemble the cope with the drag', "or vice versa.

Another object of my invention is to provide an adjustable hinge, partof which is :mounted upon the cope and the remaining part upon the dragwhereby split patterns or match plates of different thiclnisses can besuccessfully and edciently drawn, thereby eliminating the labor ofpatching the mold after drawing, which is frequently necessary with handor machine drawing.

My invention consists in the construction, combination, location andarrangement of parts, as herein set forth and claimed. j

In the drawing:

Fig'. 1 is a side elevational view of a flask having two of my improvedadjustable hinges mounted on the cope and drag and showing a match plateor split pattern inserted between the cope and drag;

lig. 2 is an end elevation thereof;

Fig. 3 is a similar end elevation with the match plate or split patternremoved;

liig. fle is a fragmentary perspective view of one corner of Fig. 1:

Fig. 5 is a fragmentary perspective view of one corner of the drag; and

Fig. 6 illustrates a portion of the hinge, part of which appears insection.

ln the embodiment of my invention as illustrated and which shows apreferred construction l provide an adjustable hinge for foundry iiaslrsthe latter comprising cope 1 and drag 2. rllhe cope 1, as shown in Fig.1, is provided with bearing-lugs 3, which may be integrally formedtherewith or attached in any suitable manner as desired. Each of thebearing-lugs 3 has its hole t disposed horizontally for the purpose ofreceiving pivotpin 5, as clearly shown. The drag 2 is provided with apair of eye lugs 6, which lugs V may also be formed integral therewithor attached in any suitable manner as desired.

Each of the eye lugs 6 is provided with vertically disposed hole 7 forthe purpose of slidably receiving` the shank 8 of sliding pin 9. rlheupper end of said pin 9 is enlarged to form head 10, which headis'provided with a horizontally/disposed hole 11 through which one ofthe pivot pins 5 is adapted to be iI1- sorted.

To assemble the pins 9 between the pairs of bearing lugs 3 upon cope 1simply insert head 10 of said pin 9 between the bearing-lugs 3 until thehole 11 therein is brought into regis try with holes l in saidbearing-lugs 3. rllhen insert one of the pins within said holes 4-11 andsecurely attach pin 9 to pin 5 in any suitable manner, as for example,by dowel pin 12, as shown in Fig. 5.

Both of the pins 9 are thus pivotally attached to cope 1 and the shanlrs8 thereof are spaced apart from each other and adapted to register withholes 'i in eye lugs 6, the latter being part of the drag 2, as beforestated.

rllhe operation of a flask having my im. proved hinges thereon is asfollows:

Assume `that the split pattern or match board 18 hasbeen placed betweenthe cope 1 and drag 2, as shown in Figs. 1 and 2, respectively. Thenafter the sand has been rammed inthe cope and drag, the cope may bedrawn either by hand or by machine, but in either ease the Shanks 8 ofpins 9, slidably fitted within hole 7 of eye lugs 6, eliminate the usualdanger of spoiling the mold when drawing, thereby eliminating' the laborof patching the mold.

An advantage of this invention is that match plates or split patterns ofvarying' thicknesses can be readily handled by iiaslrs equipped with myimproved adjustable hinge.

By carefully considering the description in connection with the showingmade on the drawing, it will be understood that the device is ofcomparatively simple construction, practical in operation and veryadvantageous. is the use and construction is clear a more lengthydescription need not be entered.

Having thus described my invention, what l claim as new and desire tosecure by Letters Patent is: j

1. In combination with a foundry iiaslr comprising a cope and drag, apair of spaced apart bearings mounted upon said cope, an eye lug mountedon said drag, and a pin pivotally mountedl in said bearings'and adaptedfor slidable engagement with said' eye lug.

2. An adjustable hinge for a foundry flask comprising a pair of spacedapart. bearings integrally formed with the cope of said flask, an eyelug integrally formed with the drag of said flask and having its holedisposed vertically therethrough and a pin hav- 5 ing a reduced `s iankand pivotally mounted in said bearings7 said shank being adapted toslidahly engage said vertically disposed hole.

3. An adjustablehinge for foundry flasks comprising a cope having aplurality of pairs 10 of extended bearings, a drag having a plurality ofextended eye lugs, pivot pins swingably mounted in said bearings, theshanks of which are adapted to slidably lit Within said eye lugs foradjustablg7 and pivotally connecting said cope with said drag `for theinsertion of split patterns or match plates of varying thicknessesbetween said cope and drag.

CHARLES L. GHMANN.

